Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4308425 | Variable-directivity microphone device | Atushi Yumoto, Naotaka Miyaji, Hiroshi Ogawa, Isami Nomoto | 1981-12-29 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4308425 | Variable-directivity microphone device | Atushi Yumoto, Naotaka Miyaji, Hiroshi Ogawa, Isami Nomoto | 1981-12-29 |